package 第七章;
import java.util.*;
public class demo7 {
    public static void main(String args[]){
        Scanner reader=new Scanner(System.in);
        double sum=0;
        int m=0;
        while(reader.hasNextDouble()){
            double x= reader.nextDouble();
            assert x<=100&&x>=0:"数据不合理";
            m++;
            sum=sum+x;
        }
        System.out.printf("%d个数的和为%f\n",m,sum);
        System.out.printf("%d个数的平均数%f\n",m,sum);
    }
}
